Config option for verifier event_types
Merge pull request #223 from ramielrowe/config_verifier_event_type

Config option for verifier event_types
Minor changes to readme.md to make instructions clearer. Also fixed sample_worker_config.
Modified glance worker to process the new exists notification
removed created_at from list of fields that are verified in image.delete verification
Added warning when invalid payload is encountered while saving exists notification
Ensured that image verified event is sent only once per owner for all his images
- Made changes so that we verify each group of exists messages with
  the same owner and raw_id separately. This ensures that if there are
  multiple exists notifications for each owner pending verification,
  we send an individual verified notification for each of them.

- Fixed race condition which was causing multiple verified messages to be
  sent by starting the async verify process per owner instead of per image.
Merge pull request #224 from anujm/readme_and_config_changes

Minor changes to readme.md to make instructions clearer. Also fixed sample_worker_config.
Merge pull request #225 from anujm/glance_exist

Glance exist
service can be given as parameter to stacky/hosts to get specific results
default to {} in both None or nonexistent case for bandwidth
Merge pull request #230 from TMaddox/fix_null_bandwidth

default to {} in both None or nonexistent case for bandwidth
unit test for when bandwidth is None
Merge pull request #231 from TMaddox/fix_null_bandwidth

unit test for when bandwidth is None
Using new exist object in callback
Merge pull request #233 from ramielrowe/callback_fix

Using new exist object in callback
Get or create deployment in parent process

Doing this in the parent process avoids a race condition
where two consumers for a single deployment attempt to
create new deployments at the same time. Thus, creating
duplicate deployments.
Merge pull request #235 from ramielrowe/dup_dep_fix

Get or create deployment in parent process
Made Nova flavor field name configurable